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Diffstat (limited to 'include/openbsc/subchan_demux.h')
-rw-r--r-- | include/openbsc/subchan_demux.h | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/include/openbsc/subchan_demux.h b/include/openbsc/subchan_demux.h deleted file mode 100644 index 9661b0481..000000000 --- a/include/openbsc/subchan_demux.h +++ /dev/null @@ -1,102 +0,0 @@ -#ifndef _SUBCH_DEMUX_H -#define _SUBCH_DEMUX_H -/* A E1 sub-channel (de)multiplexer with TRAU frame sync */ - -/* (C) 2009 by Harald Welte <laforge@gnumonks.org> - * All Rights Reserved - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - */ - -#include <sys/types.h> -#include <openbsc/linuxlist.h> - -#define NR_SUBCH 4 -#define TRAU_FRAME_SIZE 40 -#define TRAU_FRAME_BITS (TRAU_FRAME_SIZE*8) - -/***********************************************************************/ -/* DEMULTIPLEXER */ -/***********************************************************************/ - -struct demux_subch { - u_int8_t out_bitbuf[TRAU_FRAME_BITS]; - u_int16_t out_idx; /* next bit to be written in out_bitbuf */ - /* number of consecutive zeros that we have received (for sync) */ - unsigned int consecutive_zeros; - /* are we in TRAU frame sync or not? */ - unsigned int in_sync; -}; - -struct subch_demux { - /* bitmask of currently active subchannels */ - u_int8_t chan_activ; - /* one demux_subch struct for every subchannel */ - struct demux_subch subch[NR_SUBCH]; - /* callback to be called once we have received a complete - * frame on a given subchannel */ - int (*out_cb)(struct subch_demux *dmx, int ch, u_int8_t *data, int len, - void *); - /* user-provided data, transparently passed to out_cb() */ - void *data; -}; - -/* initialize one demultiplexer instance */ -int subch_demux_init(struct subch_demux *dmx); - -/* feed 'len' number of muxed bytes into the demultiplexer */ -int subch_demux_in(struct subch_demux *dmx, u_int8_t *data, int len); - -/* activate decoding/processing for one subchannel */ -int subch_demux_activate(struct subch_demux *dmx, int subch); - -/* deactivate decoding/processing for one subchannel */ -int subch_demux_deactivate(struct subch_demux *dmx, int subch); - -/***********************************************************************/ -/* MULTIPLEXER */ -/***********************************************************************/ - -/* one element in the tx_queue of a muxer sub-channel */ -struct subch_txq_entry { - struct llist_head list; - - unsigned int bit_len; /* total number of bits in 'bits' */ - unsigned int next_bit; /* next bit to be transmitted */ - - u_int8_t bits[0]; /* one bit per byte */ -}; - -struct mux_subch { - struct llist_head tx_queue; -}; - -/* structure representing one instance of the subchannel muxer */ -struct subch_mux { - struct mux_subch subch[NR_SUBCH]; -}; - -/* initialize a subchannel muxer instance */ -int subchan_mux_init(struct subch_mux *mx); - -/* request the output of 'len' multiplexed bytes */ -int subchan_mux_out(struct subch_mux *mx, u_int8_t *data, int len); - -/* enqueue some data into one sub-channel of the muxer */ -int subchan_mux_enqueue(struct subch_mux *mx, int s_nr, const u_int8_t *data, - int len); - -#endif /* _SUBCH_DEMUX_H */ |